Mechanism for feeding material from rolls



July 7, 1925.

J. S. COLDWELL MECHANISM FOR FEEDING MATERIAL FROM ROLLS m 5Sheets-Sheet 1 Filed July 2.0, 1923 INVENTOR W ism/m ATTORNEY July 7,1925.

J. S. COLDWELL 4 MECHANISM FOR FEEDING MATERIAL FROM ROLLS Filed July20, 1923 5 Sheets-Sheet 2 INVENTOR ATTORNEY July 7, 1925. 1,544,557

- J. s. COLDWELL MECHANISM FOR FEEDING MATERiAL FROM ROLLS Filed July20, 1925 5 Sheets-Shet, 4

INVENTOR BY I I I I ATTORNEY J. S. COLDWELL MECHANISM FOR FEEDINGMATERIAL FROM R LLs Filed July 20, 1923 5 Sheets-Sheet 5 'INVENTOR 309m2 GMcLwx/(L ATTORNEY.

Patented July 7,

UNITED VSTLATESF PATENT OFFICE I JOHN S. COLDWELL, OFMILWAUKEE,WISCONSIN, ASSIGNOR' TO THE cu'rnmm- HER MFG. ,CO.,.- 01 MILWAUKEE,WISCONSIN, A CORPORATION 01 WISCONSIN.

MECHANISM FOR FEEDING MATERIAL FROM Application filed July 20, 1923.Serial nuiesavoe.

To all wlziom itmay concern: 4 7 Be it known thatI, JOHN S. CoLnwELL, 'acitizen of the United States, residing at Milwaukee, in the county ofMilwaukee and State of \Visconsin, have invented newand usefulImprovements in Mechanisms for Feeding Material from Rolls, of which thefollowing is a full, clear, concise, and exact description, referencebeing had to themcompanying drawing, forming a part of thisspecification. I This invention relates to mechanisms for feedingmaterial from rolls to receiving machines and more-particularly to webfeeding mechanisms for printing presses. The invention has among itsobjects to provide a mechanism of the aforesaid character which isadapted to effect quick connection of the web of an active roll, priorto exhaustion thereof to the web of a reserve roll while maintainingsaid rolls in fixed axial position.

Another object is to provide a mechanism of the aforesaid characterhaving improved tensioning means associated therewith, for maintaining asubstantially constant tension on the web as the same proceeds into thepress. I

Another object is to provide tensioning means of the aforesaid characterwhich can be readily adjusted to vary the tension on the proceeding web.1

Another object is to provide a mechanism of the aforesaid characterincluding separate roll supporting frames for supporting the active andreserve web rolls such frames being movable to facilitate installation'of the rolls thereon.

Another object is to'provide improved means for effecting marginadjustments of the rolls.

Another object is to provide means for braking the rolls during quickstopping of the press. 1

Various other objects and advantages of the invention will hereinafterappear.

The ac'companyingdrawings illustrate an embodiment of the inventionwhich will now he described'it being understood that the embodimentillustrated is' susceptible of modification without departing from thescope of the appended claims.

In the drawings: Figure 1, is aplan view of" a device embodying theinvention.

Fig. 4, is an end elevational view of the .tensioning mechanism.

Fig. 5, is an end elevational view of the web renewing mechanism takensubstantially on line 5-5 of Fi 1.

Fig. 6, is an en elevational view of certain of the parts as viewed handend of Fig. 1, and,

Figs. 7, Sand 9 are diagrammatic views illustrating the operation of theweb renewmechanism.

eferring to the drawings and particularly to Fig. 1 the same illustratea web renewing and tensioning mechanism including a bed plate A havingroll supporting frames B and B mounted thereon either of said framesbeing adapted to support an active web roll and the other a reserve webroll. A web renewing mechanism C is provided for sealing the web of theactive web roll prior to exhaustion thereof to the web of a substituteroll and "a cutoff device D is associated with said mechanism to severthe web of the former roll upon sealing thereof with the latter. Themechanism also includes a tensioning mechanism E including partstorotate with the rolls and a co-operating part to be driven from thepress; margin adjusting devices F and F associated with frames B and I Brespectively, and brakes G and G each for braking a' roll mounted on oneof said frames.

Roll supporting frames.

The roll supporting frames B and B are arranged to support a pair of webrolls in a parallel relation, and each of the same is provided withspindles to be inserted in 0 posite ends of a core member fixed withinthe roll, to support the roll and to rotate therewith. The frames B andB are of similar construction and as shown in Fig. 2, each includes arms15 and 16 having their lower ends fixed to opposite ends of a shaft 17and an arm 18 having its lowerend splined to said shaft. Arm 15isprovided with a screw threaded opening intermediate from the right itsends for receiving a screw threaded hub 19 on a worm wheel 20, said wormwheel being rotatably mounted upon a bracket 21 fixed to a pedestal 22on bed plate A and serving as hereinafter set forth to efiect marginadjustments of the frame. The upper end of arm 15 is provided with anenand dotted lines, and is provided with a screw 27 for fixing the sameagainst movement thereon. The upper end of arm 18 is provided with anenlarged head 28 having an opening therein for receiving a sleeve 29.Sleeve 29 has a spindle 30 rotatably supported therein by suitable ballbearings, the axis of said s indle being aligned with the axis of spindle 24 and said sleeve has a toggle mechanism associated therewith forsliding the same within head 28. Said toggle mechanism includes a lever31 pivotally connected to sleeve 29 and a link 32 having one end'pivotally connected to said lever and its opposite end pivotally'connected to a block slidable within an opening in head 28 by anadjusting screw 33. The toggle members31 and 32 are adapted to be heldin their set position by a latch 34 pivoted to the former and adapted tolock with a pin on the latter.

From the foregoing it will be observed that each of the frames B and Bis adapted to rotate upon an axis common to the worm 20 and shaft 25thereof and as will now be set forth such rotative movement of theframes facilitates mounting of the web rolls thereon. In installing aweb roll upon a frame the same is moved into position between thespindles thereof by means of a truck or other suitable device and theframe is rotated so as to bring the spindles on a level with the axis ofthe roll. The roll is then moved to bring the core member thereof intoengagement with spindle 24 and spindle 30 is forced into the oppositeend of the core member under the action of the aforedescribed togglemechanism and the screw 33 associated therewith. Upon securement of theroll between the spindles the frame is rotated to the position shown inFi 6 to lift the web roll from the truck.

ower means is provided for rotating frames B and B such means includingworm wheels 35 splined to shafts'25 and co-operating worms 36 supportedby suitable brackets 37 fixed to bearings 26. The

worms 36 are adapted to be separately driven in o posite directions by areversible motor 38 Fig. 1) the worm 36 associated with frame B beingreleasably connected to said motor through the medium of a releasablejaw clutch 39 and the Worm assonected ciated with frame B beingreleasably con nected to said motor through the medium of a releasablejaw clutch 40.

As before stated arm 15 of each of the frames is mounted upon a screwthreaded hub 19 of a worm wheel 20, and it will thus be observed thatrotative movement of the worm wheels 20 will cause longitudinal movementof the frames B and B and the rolls carried thereby. The worm wheels 20are provided with driving worms 20 consaid shaft is adapted to be drivenby a reversible motor 42 through the mediumof a chain and sprocket drive43 (Fig.- 5).

Web renewing mechanism.

The web renewing mechanism includes a pair of rollers and 51 arranged ina parallel relation and supported at opposite ends members 52 and 53(Figs 1 and 3).

by a shaft .41 (Figs. 1 and 5) and i Member 52 has a pin 54 fixedthereto intermediate the ends thereof, said pin being rotatably mountedin the upper end of a lever 55, shown in Fig. Member 53 is pivotedintermediate its ends on a pin 56 fixed to the upper end of a lever 57and levers and 57 are fixed to a shaft 58 supported within suitablehearings on bed plate A. Means is provided for swinging levers 55-and57, in opposite directions between the frames B and B such meansincluding a pin 59-fixed to lever 57 and a co-operating V shaped cammember 60 fixed to a shaft 61 rotatably mounted within a suitablebearing bracket 62 on bed plate A. Shaft 61 is a apted to be driven inopposite directions by means of a reversible motor 63 said motor beingoperatively connected to said shaft through suitable driving connectionsincluding a worm wheel 64'fixed to said shaft and a co-operat- 1 uponhearing bracket 62. During swinging movement of the levers 55 and 57 inopposite directions between frames B and B rollers 50 and 51 are rotatedin opposite directions about the axis 'of pivot pins 54 and 56. Suchrotative movement is effected by means of a V shaped cam member 65 fixedto pin 54 (Figs. 3 and 5) and a co-operating stationary pin 66 supportedby. a suitable bracket. 67 extending upwardly from bed plate A (Fig. 3).Referring now to Fig. 5 it will be observed that cam member 65 isprovided with flattened faces 68 and 69 on opposite sides of pivot pin54 to be engagedselectively by a reci rocable locking member 70 fixed toa rod 1 (Fig. 3) slidable within bearing lugs 72 ,on lever 55 and ashereinafter set forth said locking member is biased upwardly to engagethe cam member 65 and is movable downwardly out of engagement therewithby an electro-magnetic operating device associated with the tensioningmechanism. As shown in Fig. 5 when the web renewing mechanism is locatedon opposite sides of its vertical position the locking member 70cooperates with the faces 68 and 69 of cam member 65 to lock the latterin positions wherein the end members 52 and 53 associated with therollers and 51 are maintained in substantial alignment with the levers55 and 57. When the web renewing mechanism is located to the left of itsvertical position the same tends to move in a counter-clockwisedirection under the action of gravity and upon locking of the cam member65 roller 50 rides on the periphery of the roll mounted in supportingframe B while roller 51 is held out of engagement therewith. When theweb renewing mechanism is located to the right of its verticalpositionthe same tends to move in a clockwise direction under the actionof gravity and upon locking of the cam member 65 roller 51 rides on theperiphery of the roll mounted in frame B while roller 50 is held out ofengagement therewith.

The cut-off device D includes a knife member 73 carried by a bracket 74(Fig. 3) said bracket being slidable within vertical recesses in arms 55and 57 and being fixed to the rod 71 associated with locking member 70.

The function and operation of the aforedescribed web renewing mechanismwill now be more fully described in connection with Figs. 7 to 9inclusive. roll I) mounted on supporting frame B and shown in Fig. 7,the web renewing mechanism occupies the position shown in. full lines.It will be observed that the roller 50 rides on the periphery of roll I)and the web in proceeding from said roll passes upwardly between roller50 and the roller 51. While the material is being drawn from the activeroll 5 into the receiving machine a reserve roll I) is mounted on theframe B said roll being arranged so that when the web thereof is drawnupwardly the same will. proceed therefrom on the side adjacent theactive web roll as shown in Fig. 8. An adhesive is applied'to the webextremity of the reserve roll Z) and prior to exhaustion of the activeweb roll I) the press is stopped and the web renewing mechanism is movedfrom the position shown in Fig. 7 towards the position shown in fulllines in Fig. 8 the rod 71 having first been moved downwardly by meansof the aforementioned electro-magnetic device. Such movement of'the webrenewing mechanism is effectedby operating motor 63 in a direction tobring the left hand prong of the V-shaped cam member into engagementwith-pin 59 on lever 57 and during movement of the web renewingmechanism through the vertical position shown in dotted lines in Fig. 7The left With an active web hand prong of cam member 65 is brought intoengagement with stationary pin 66 to rotatethe end members 52 and '53 ina counterclockwise direction. Such rotative movement of the end members52 and 53 causes the roller 50 to engage the web proceeding from theactive web roll I) and upon movement of the web renewing mechanismbeyond its vertical position cam member 65 is moved out of engagementwith the pin 66 and rollers 50 and 51 are pressed against the reserveroll 6'. The press is then started and the web in proceeding betweenroller 50 and web roll 5 causes the latter to rotate in .a clockwisedirection so as to bring the adhesive web extremity thereof intoengagement with the web proceeding from the roll b. Upon sealing of theweb of the reserve roll to the web of the active roll the aforementionedelectro-magnetic operating device associated with the tensioningmechanism is deenergized and the rod 71 is moved upwardly. During suchupward movement of said rod the knife 73 isbrought into engagement withthe web proceeding from roll I) tosever the same and locking'member 65engages cam 66 to move roller 50 out of engagement with the periphery ofweb roll I) as shown in Fig. 9. Prior to exhaustion of the web roll 5'the web thereof is connected to the web of a reserve roll installed onthe frame B by returning the web renewing mechanism to the positionindicated in dotted lines in F ig. 9. During such movement the endmembers52 and 53' are rotated in a c ockwise direction and the roller 51acts on the web of .roll I) to seal the same to the web of the reserveroll on frame B.

In connection with the foregoing it should be noted that during webrenewing operations the cam member 60 is always rotated between theextreme position indicated in full lines in Fig. 7 and the extremeposition indicated in full lines in Fig. 9. The web renewing mechanismis thus always free to .move under the action of gravity towards thespindle of the active web roll as the diameter of'such roll decreases.Furthermore it should be noted that during movement of the cam members60 between the aforesaid extreme positions the same acts to ease rollers50 and 51 intoengagementwith the reserve web rolls.

; Tensiom'mg mechanism.

The tensioning mechanism includes a pair of friction discs 75 each to bedriven from one of the spindles 24 and a. co-operating' friction wheel76 to be driven from the press and adapted to engage said discsalternately upon movement of the web renewing mechanism inopposite'directions between the web rolls carried by frames B and 'B'.As best shown in Figs. 1 and 2 the friction discs 79. Friction wheel 76is carried by an arm 80 (Fig. 3) which is fixed to shaft 58 to movetherewith, and the same is arranged in a plane common to the axis ofrollers and 51 when the latter are looked through engagement of lockingmember 70 with cam member 65. Also as best shown in Fig. 4 the radialdistance of the axis of friction wheel 76 from the axis of shaft 58 issubstantially the same as the radial distance of the axis of either ofthe friction discs from the axis of said shaft. It should now be notedthat during unwinding of a web roll mounted on either of the supportingframes, the friction wheel always moves with the web renewing mechanismtowards the axis of the friction disc 75 associated with the active rolland that the radial distance 'of the friction wheel from the axis ofsuch disc will always be proportional to the web roll diameter. Frictionwheel 76 is driven from the press at a speed whereby the same actsthrough the friction discs to impose a drag on the active Web roll, suchdrag being adjustable as hereinafter set forth, by means of a springpressure device adapted to vary the pressure of said wheel on saiddiscs. Assuming that the dragging effect of wheel 76 on the discs isconstant it is apparent that variation of the position of said wheelwith respect to the axis of the discs as above set forth, will produce asubstantially constant tension on the material proceeding from. theactive web roll.

The construction of the tensioning mechanism will now be more fully setforth. The supporting member 80 for friction wheel 76 is pivotallyconnected to a yoke member 81 (Figs. 1 and 3) said yoke member havingone end fixed to the shaft 58 and having its opposite end supported in abearing 82 in axial alignment with said shaft. The lower end of themember 80 is provided with downwardly projecting lugs 83 (Fig. 4) toengage the yoke member 81 on opposite sides thereof and the left handlug 83 is pivotally secured to one side of the yoke member by sleeve 84while the right hand lugis pivotally secured to the opposite side ofsaid yoke member by a pin 85. The friction wheel 76 is driven throughthe medium of a chain and sprocket connection 86 from a pin locatedwithin sleeve 84, said pin being driven from a shaft 87 (Fig. 3) throughthe medium of bevel gears 88. Shaft 87 is sup ported at opposite ends bybearings in yoke member 81, and the same is driven from the pressthrough bevelgears 89 and a shaft 90.

During movement of the transfer mechatendin (Figs. 3 and 4) said magnethaving a field member 92 provided with downwardly exprojectionspivotally connected to the yo e member 81 by. sleeve 84 and pin 85.Field member 92 has an annular recess therein for receiving anelectromagnetic winding 93 and the member 80 is provided Evith anarmature portion 94 to be attracted aid field member 91 are biased inopposite directions by a coil spring 95 held under compression betweensaid supporting mem-' ber 80 and a lug 96 on said field member and thecompression of said spring is adjustable by means of the screw device 97threaded into lug 96. 'Member 80 is provided with a projecting arm 98which carries an adjustable stop 98 for engaging the upper face of yokemember 81 and field member 91 is provided with an arm 99 below the pivotpoint thereof, said arm having its free end thereof connected by a link100 to the rod 71 associated with the locking member 7 0. l I

From the foregoing it will be noted that upon energization of winding 93supporting member 80 is attracted to move the friction wheel 76outwardly with respect to the faces of the friction discs 75 suchmovement being limited by engagement of the stop 98 with yoke member 81.Upon arrest of the supporting member 80 field member 91 moves towardsthe same and arm 99 then acts through link 100 and rod 71 to disengagelocking member from cam member 65 and to move knife member 73downwardly. Winding 93 is always energized during Web renewingoperations and upon completion of such operations the same isde-energized. Spring 95 then acts to move the field mem ber 91 andsupporting member 80 in opposite directions and such movement brings thefriction wheel 76 into engagement with one of the friction discs andalso moves the knife member 7 3 and cam block 70 upwardly to obtain theresults described in connection with the web renewing mechanism.

During stopping of the press, friction wheel 76 brakes the disc 75associated with the active web roll but upon quick stopping of the presssuch braking action of the wheel 76 is insufficient to preventover-running of the active web roll. To provide for quick stopping of anactive web roll mounted on either of the supporting frames, thesupporting bracket 21 of each of the frames is recessed, as shown inFig. 2 to receive an electromagnetic winding 101, and each of thefriction discs 75 has a spring disc 102 said winding. Supporting member89 v fixed thereto which carries an armature member 103. Each of thearmature members 103 is adapted to be'attracted by, its

' other.

respective winding 101 against a friction face on the associated bracket21 whereby either of the friction discs 75 can be braked to provide forquick stopping of an active web roll.

Rsum of operation.

The operation of the aforedescribed web renewing and tensioningmechanism as a whole, will now be briefly set forth. Assume that anactive web roll is mounted on either of the supporting frames and that areserve web roll has been installed on the Prior to exhaustion of theactive web roll the press is stopped and the active web roll is broughtto rest with the press through braking of thesiiassociatedfriction disc75 by friction wheel 76 or if necessary by energization of winding 103of the associated brake. Winding 93 is then energized anduponvenergization thereof friction wheel 7 6 ismoved out of the plane ofthe friction discs 75, cam is released and knife 73 is moved downwardly.Immediately thereafter the web renewing mechanis'mis operated by motor63to bring the web of the active roll into engagement with the periphcryof the reserve roll. The press is then slowly started and the web of thereserve roll adheres to the proceeding web of the active roll and isdrawn into the press therewith. As soon as the web of the reserve rollis drawn into the press winding 93 is deenergized and the press isbrought up to speed. Upon deenergization of winding 93 friction wheel 76is brought into engagement with the disc 75 associated with the reserveweb roll, knife 7 3 is moved upwardly to sever the web proceeding fromthe active web roll, and cam member 65 is locked. The tensioningmechanism then functions to maintain a substantially constant tension onthe proceeding web.

What I claim as new and desire to secure by Letters Patent is 1. In amechanism for tensioning material drawn from a supply roll into areceiving machine, in combination, a friction disc associated with theroll torotate therewith, a friction member engaging said disc to brakethe same and thereby tension the material proceeding from the roll, saidlatter member being adjustable transversely with respect to saidfriction disc vary the braking effect thereof and automatic controlmeans for said friction member including a follow-up member to ride onthe periphery of the roll, said follow-up member being adapted to varythe position of said frlction member with respect to the axis of sa ddlsc to maintain; a substantially constant tension on the materialproceeding from th roll. 7 v

2. In a mechanism for tensioning material drawn from a supply roll intoa receiving machine, in combination, a friction disc associated with theroll to rotate therewith, a co-operating friction wheel driven by therecelving machine at a speed proportional thereto, said friction wheeltending to brake said disc and being adjustable transversely withrespect to the axis of said disc for variation of the braking effectthereof and means for automatically varying the position of saidfriction wheel with respect'to the axis of said disc to maintain asubstantially constant tension on the material proceeding from the roll.v

3. In a mechanism for tensioning material drawn from a web roll into areceiving machine in combination a friction disc associated with theroll to rotate therewith, a friction wheel arranged in a plane atsubstantially right angles tothe plane of said disc and adapted toengage said disc at varying distances from the axis thereof, saidfriction wheel being driven from the receiving machine at a speedwhereby the same tends to retard said disc, and control means for saidfriction wheel including a followup'member adapted to ride on theperiphery of the roll, said member being adapted to vary the position ofsaid wheel with respect .to the axis of said disc in accordance withvariations in the toll diameter to maintaina substantially constanttension on the material proceeding from the roll. 4. Ina tensioningmechanism for a material drawn from a supply roll into .a receivingmachine, in combination, a member to rotate with the roll a partfrictionally engaging said member to retard the same and thereby tensionthe material proceeding from the roll means for varying the pressure ofsaid part on said member to vary the retarding effect thereof andautomatic control means for said part adapted to vary thepositionthereof with respect to the axis of said member to maintain asubstantially constant tension on the material proceeding from the roll.5.- In a mechanism for tensioning material drawn from a supply roll intoa receiving machine, in combination, a friction disc to rotate with theroll, a friction wheel engaging said disc, said wheel being driven fromthe receiving machine at a speed whereby the same tends to retard saiddisc to tension the material proceeding from the roll, means for varyingthe pressure of said wheel on said disc to vary the tension on thematerial proceeding from the roll and automatic control means for saidfriction wheel adapted to vary the position thereof with respect I tothe axis of said disc tomaintain a sub- 1 with the roll, a frictionwheel engaging said disc, and arranged in a plane at substantially rightangles to the plane thereof, said friction wheel being driven from saidreceiving machine at a speed tending to retard said disc and beingadapted to move towards the axis of said disc as the roll diameterdecreases and means for maintaining the plane of said wheelsubstantially tangent to the periphery of the roll as the roll diameterdecreases to produce a substantially constant tension on the proceedingweb.

7. In a mechanism for tensioning material drawn from a web roll into arecelvlng machine, in combination a friction disc to ro-' constanttension on the proceeding web, and

means for varying the pressure of said wheel on said disc to vary thetension on the proceeding web.

8. In a mechanism of the character de-' scribed in combination a pair ofspindles either being adapted to support an active web roll andthe-other a reserve web roll, means for imposing a frictional drag onsaid spindles alternatively for tensioning of the material proceedingfrom the active web roll and automatic control means associated withsaid former means to render dragging effect therof a function ofvariations in the diameter of the active roll.

' 9. In a machine of the character described in combination a pair ofspindles either being adapted to support anactiveweb roll and the othera reserve web roll, means for imposing a frictional drag on saidspindles alternatively for tensioning of the material proceeding fromthe active web roll and automatic control means for said former meansadapted to vary the dragging effect thereof in accordance withvariations in the diameter of the active roll, said control meansincluding a pair of follow-up members, one to ride on the peripher of anactive web roll mounted on one 0 said spindles and the other to ride onthe periphery of an active Web roll mounted on the other of saidspindles. I

10. In a mechanism of the character described, in combination, a pair ofsupporting spindles either being adapted to support an active web rolland the other a reserve web roll, means for imposing a frictional dragon said spindles alternativel for tensioning of the material proceedingfrom the act'we web roll, said means including a fricsaid discsalternatively.

11. In a mechanism of the character described in combination a pair ofspindles either being adapted to support an active web roll and theother a reserve Web roll, means for imposing a frictional drag on saidspindles alternatively for tensioning of the material proceeding fromthe active web roll, said means including a pair of friction discs eachto rotate with one of said spindles and a co-operating friction wheel tobe driven from the receiving machine at a speed proportional thereto,said friction wheel being adapted to engage said friction discsalternatively; and control means for said friction wheel adapted toautomatically vary the position thereof with respect to the axis ofeither of said discs to maintain a substantially constant tension on theweb proceeding from the active roll.

12. In a mechanism of the character described in combination, a pair ofroll supporting spindles having their axis arranged in a parallelrelation, a friction disc associated with each of, said spindles torotate therewith, said discs having friction faces arranged in a commonplane, a friction member movable between said discs and adapted toengage the same alternatively to tension the material proceeding from anactive roll mounted on'either of said spindles, and means for movingsaid friction member out of the plane of the friction faces on saiddiscs to permit free movement thereof between said discs.

13. In a mechanism of the character described, in combination of a pairof'web roll supporting spindles having their axes arranged in a parallelrelation, a'friction disc associated with each of said spindles torotate therewith, said discs having friction faces arranged in a commonplane, a friction wheel movable between said discs and adapted to engagethe same alternatively to tension the material proceeding from an activeweb roll, and means for bringing the web of an active roll mounted oneither of said spindles into engagement wifh the periphery of a reserveroll mounted onethe other of said spindles for sealing of the web of theformer to the web of the latter and for simultaneously moving said wheelout of engagement with the disc associated with the active roll and intoengagement with the .disc associated with the reserve roll.

web of the former to the adhesive extremity of the latter, said meansincluding a air of members movable in opposite directions between saidspindles, and adapted during such movements to rotate about an axisintermediate the same.

15.. In a web renewing mechanism, for a pair of web rolls supported in aparallel relation, either of said rolls being active and the other beingin reserve, in combination a pair of members between said rolls to havethe web of the active roll pass therebetween, and means for moving saidmembers in opposite directions between said rolls and for causing thesame during such movement to rotate about an axis intermediate the same.

1 6. In a web renewing. mechanism for a pair of web rolls supported in aparallel relation, either of said rolls being active and the other beinin reserve, in combination a pair of rollers etween said. rolls to havethe web of the active roll pass therebetween, and means for moving saidrollers in opposite directions between the web rolls and to cause saidrollers to move in intersecting paths during movement from one web rolto the other.

17. A mechanism of the character described including'separate frames forsupporting a pair of web rolls in a parallel relation, each of saidframes being provided with aligned spindles for receiving a web rolltherebetween and being movable about an axis arallel to said spindles tofacilitate installation of'a web roll thereon.

18.-A mechanism of the character described in combination separateframes for supporting a pair of web rolls in a parallel relation, eachof said frames being provided with aligned spindles for receiving a webroll therebetween, means for moving each of said frames about an axisparallel to the spindles thereof to facilitate installation of a webroll thereon, and means associated with said frames for efiec'tin axialadjustments of the rolls mounted t ereon.

19. In a mechanism of the characterde: scribed, in combination a pair ofspindles, either being adapted to support an active web roll and theother a reserve web roll, means for imposing a frictional drag on saidspindles alternatively for tensioning of the material proceedingfrom'the active web roll and an electro-magnetic brake associated witheach of said spindles for effecting quick stopping of an active ,webroll.

.In witness whereof, I have hereunto subscribed my name,

JOHN s. oonnwnnn

